CN102297050B - Manufacture of acoustic silencer - Google Patents
Manufacture of acoustic silencer Download PDFInfo
- Publication number
- CN102297050B CN102297050B CN201010503931.5A CN201010503931A CN102297050B CN 102297050 B CN102297050 B CN 102297050B CN 201010503931 A CN201010503931 A CN 201010503931A CN 102297050 B CN102297050 B CN 102297050B
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- China
- Prior art keywords
- sleeve insert
- parison
- resonator
- distance
- hole
- Prior art date
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- Expired - Fee Related
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 230000003584 silencer Effects 0.000 title description 2
- 238000000034 method Methods 0.000 claims abstract description 28
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 238000007664 blowing Methods 0.000 claims description 61
- 238000001746 injection moulding Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000000071 blow moulding Methods 0.000 abstract 1
- 229920003023 plastic Polymers 0.000 description 31
- 239000004033 plastic Substances 0.000 description 31
- 239000002184 metal Substances 0.000 description 16
- 230000008901 benefit Effects 0.000 description 14
- 238000011144 upstream manufacturing Methods 0.000 description 13
- 238000007789 sealing Methods 0.000 description 10
- 238000005452 bending Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 239000002360 explosive Substances 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005562 fading Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B33/00—Engines characterised by provision of pumps for charging or scavenging
- F02B33/44—Passages conducting the charge from the pump to the engine inlet, e.g. reservoirs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
- F02M35/10104—Substantially vertically arranged ducts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
- F02M35/10144—Connections of intake ducts to each other or to another device
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/1034—Manufacturing and assembling intake systems
- F02M35/10354—Joining multiple sections together
- F02M35/1036—Joining multiple sections together by welding, bonding or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1255—Intake silencers ; Sound modulation, transmission or amplification using resonance
- F02M35/1266—Intake silencers ; Sound modulation, transmission or amplification using resonance comprising multiple chambers or compartments
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1283—Manufacturing or assembly; Connectors; Fixations
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
A method for manufacturing a resonator is disclosed in which a sleeve insert is placed into a fixture within a blow molding apparatus. The sleeve insert has a wall with a first plurality of apertures in the wall at a first axial distance and a second plurality of apertures in the wall at a second axial distance. A parison is slid over the sleeve insert; a mold is clamped over the parison causing the parison to press into the sleeve insert at three locations: near the ends of the sleeve insert and at a location between the pluralities of apertures; and air is blown into the sleeve insert, via a blow pin, to expand the parison into the walls of the mold to form cavities proximate the first and second pluralities of apertures. After cooling, the mold opens to release the newly formed resonator.
Description
Technical field
The present invention relates to the resonator of the noise that decay is produced by inlet air compressor in explosive motor air inlet and the tube equipment being associated and the method for manufacturing described resonator.
Background technique
The compressor section of vehicle turbocharging device produces bad high-frequency sound.Conventionally by interior pipe silencer or resonator these frequencies that decay.As everyone knows, these acoustic equipments are to be made up of a kind of metallic conduit, wherein metal insert are pressed in this pipeline.Resonator is sandwiched in or is welded in the pipeline between compressor and motor.These joints are subject to the impact of leakage and mechanical failure.And the press fit between pipeline and insert allows some to leak, and therefore provide than expecting the poor effect of attenuation characteristic.In addition the metallic conduit that, is connected to resonator has limited flexibility and has proposed challenge to the indoor assembling of vehicle motor.
Summary of the invention
In order to solve at least one problem of the prior art, a kind of resonator that comprises sleeve insert is disclosed, this sleeve insert the first end of inner sleeve and the sealing of the second end be connected to external pipe.Sleeve insert has and is positioned at along the first hole of sleeve insert the first axial distance, is positioned at the rib extending along the second hole and the outward radial of sleeve insert the second axial distance.Rib is between the first hole and the second hole.External pipe also seals at rib place and is connected to sleeve insert.
Resonator has first ring shape chamber and the second annular chamber, and the first annular chamber is formed near between the sleeve insert and external pipe at the first hole site place, and the second annular chamber is formed near between the sleeve insert and external pipe at the second hole site place.The first chamber is connected to sleeve insert by first hole or multiple the first hole fluid.The second chamber is connected to sleeve insert by second hole or multiple the second hole fluid.
In one embodiment, external pipe is by being placed near the O type ring on the sleeve insert of first end and the second end and the sealing of sleeve insert.In certain embodiments, sleeve insert has the groove that can insert O type ring.
Do not have in other embodiment of O type ring at some, sleeve insert has barb so that extra surface area to be provided at its two ends, thereby is convenient to being connected between sleeve insert and external pipe.In certain embodiments, rib has tip end to engage with external pipe, thereby promotes firmly to connect.In certain embodiments, can, by the feature setting on described surface, provide larger surface area as X-shaped, point, circle or any other suitable feature, to promote being connected between sleeve insert and external pipe.The difference of rib and barb is that rib is from stretch out at least 0.1 times of sleeve insert diameter of sleeve insert, and barb is outward extending less projection, is mainly used in increasing contact surface area.Rib stretches out and is less than the internal diameter of sleeve insert from sleeve insert.Be in the embodiment of plate at sleeve insert, rib extends to the distance of plate and is less than external pipe internal diameter.This internal diameter is defined in the position of installing away from plate.The elongation that rib extends from sleeve insert depends on the size in chamber.As larger in fruit caving, external pipe is set to fartherly to produce chamber, and rib stretches out with the position contact external pipe between two chambeies.By rib being housed on sleeve insert, the bending radius on external pipe is significantly reduced.
Rib has produced an advantage,, in the time that external pipe is pushed the rib with contact sleeve insert by mould, has avoided to a great extent clamping external pipe.This prevented, between the first hole and the second hole, parison is pressed into sleeve insert in time parison stretching, wrinkle and/or cracking.
The first chamber and the second chamber are formed on the both sides near multiple first holes of sleeve insert and the rib in the second hole.In one embodiment, the cross section in chamber is roughly annular.In another embodiment, the outer rim at least one chamber is non-circular so that assembling.For example, thus this can be conducive to make the part of resonator and inwall to closely cooperate to have plat surface.
For the gas handling system of explosive motor, in certain embodiments, resonator can be connected to flexible cuff, and this flexibility cuff is connected to the outlet of compressor.Alternatively, resonator can be connected to by flexible cuff or other suitable connector the entrance of compressor.
In order to solve at least one problem of prior art, according to one embodiment of present invention, manufacture the method for resonator and comprise sleeve insert is placed in the fixing device in the open mold of blowing device.In one embodiment, blowing pin is incorporated in fixing device.Then, make parison slip over the whole length of sleeve insert.Mould is clamped parison, and air is sold and is blown into sleeve insert by blowing.Mould clips to parison in sleeve insert at three axial clamp point places.In an optional embodiment, fixing device does not comprise blowing pin.It is a part for mould device that blowing pin changes into.In certain embodiments, near three folder points, sleeve insert is heated to promote bonding between sleeve insert and parison.In other embodiments, do not use and preheat, and realize sealing by mechanical interference.In an optional embodiment, make before parison slips over sleeve insert, O type ring is placed on sleeve insert near the one or more folder points place on sleeve insert.When abundant, when cooling, resonator is released by opening mould.Resonator comprises sleeve insert and parison.
In certain embodiments, sleeve insert is made by injection molding technique.Normally tubulose of sleeve insert, and have at least one hole in the sidewall of the pipeline at the first axial spacing place has at least one hole in the sidewall of the pipeline at the second axial spacing place.In certain embodiments, sleeve insert have the rib extending from sleeve insert outward radial of position in multiple first holes of the first distance along sleeve insert, in multiple second holes at the second distance place along sleeve insert, between multiple the first holes and multiple the second hole and near the first end of sleeve insert from outward extending at least one barb of sleeve insert and be positioned at sleeve insert the second end from outward extending at least one barb of sleeve insert.Clamping mold makes parison be connected three positions with sleeve insert: at the barb place of sleeve insert first end, at barb place and the rib place at sleeve insert the second end place.In certain embodiments, multiple the first holes and the second hole are grooves.
In certain embodiments, sleeve insert is made up than the higher plastic materials of fusing point of the plastic materials of manufacturing parison of a kind of fusing point.Alternatively, this bi-material has similar fusing point.The advantage that sleeve insert has higher fusing point is, keeps the shape of sleeve insert during the outer mold parisons of sleeve insert.The advantage that bi-material has similar fusing point is that sleeve insert is also therefore bonding with parison fusing during molded (overmold).In certain embodiments, bi-material has similar expansion coefficient.
Advantage according to an embodiment of the invention is owing to making parison slip over the whole length of sleeve insert, therefore between the two be connected to parison (or external pipe) inside.Therefore,, if the problem of sealing has solved, do not arrive outside leakage.
Be that according to another advantage of some embodiments material reaches its fusing point by sleeve insert being preheated near tie point, thereby parison and sleeve insert weld together when by mould holding.This provides than the better sealing of press fit.
And, be that according to another advantage of some embodiments plastic pipe can bend to the radius less than metallic conduit.Resonator can be formed as at one end or on two ends, have the pipeline relatively bending closely so that assembling.By forming the resonator with integrated pipeline, the quantity connecting is minimized.Can there is potential leakage or fault in connection.Connect need fixture or as the technique such as welding connect two parts that will connect.Connection has still less reduced cost and has increased the reliability of pipe-line system.
According to one embodiment of present invention, resonator can have the single chamber being positioned at apart from resonator end certain distance.But, in many application, cause that the scope of the unsatisfied compressor noise frequency of Consumer could not fully be decayed by single chamber.Two chambeies can be set, and the first chamber is wherein positioned at the first distance along sleeve insert, and the second chamber is positioned at second distance place.In addition the hole that, sleeve insert fluid is connected to the first chamber has the geometric configuration that is different from the hole that the second chamber is connected with sleeve insert fluid.The first chamber is mainly at a side frequency of fadings of frequency range, and the second chamber is mainly at the opposite side frequency of fadings of frequency range.The present invention can expand to three or more chambeies so that the more effective noise attentuation in frequency range to be widely provided.
Conventionally be provided with resonator in compressor downstream.Alternatively, noise can be by being positioned at the resonator decay of upstream of compressor.
In one embodiment, compressor is a part for turbosupercharger.Turbosupercharger is held the compressor and the exhaust driven gas turbine that connect by axle.In another embodiment, compressor is the mechanical supercharger that is connected to the output shaft of motor by the belt of clutch or motor.Compressor can be any applicable type.
An advantage of the present invention is that, by the described parison of the outer blowing of sleeve insert, in the embodiment with multiple chambeies, described chamber is sealing mutually on the outer surface of sleeve insert.It is found that, as will be, illustrated in fig. 15, compared with the system (be that surface adjoins each other, but do not seal) of inner sleeve press fit in external pipe, in the time that chamber seals mutually, can improve noise attentuation.
By replacing metal to manufacture resonator with plastics, the weight of resonator is reduced to approximately 125 grams (for standard resonators) from about 200 grams.When optimizing when minimum required wall thickness to be provided, the resonator of actual production may be less than 125 grams.Because upstream and downstream pipeline is all to make with plastic components, reduce so realize extra weight in the pipe-line system with plastics resonator.In addition, plastics are connected with plastics, as the connection between the pipeline that resonator and its were connected, can realize by welding or molded, and this has been avoided the demand to fixture used in metal resonators system.
The cost of plastic components is the half with the cost of the suitable parts of metal manufacture.By remove fixture from pipe-line system, aspect the quantity of parts and labour force, realizing extra saving.
According to one embodiment of present invention, pipe-line system comprises (being from upstream to downstream): compressor, flexible cuff, upstream line, resonator, downstream line and interstage cooler.Except not having upstream line, comprise identical element with the pipe-line system of metal resonators.In the system with metal resonators, flexible cuff beguine is longer according to the flexible cuff of one embodiment of the present of invention, because metallic conduit can not be by very closely bending, so any bending more closely must be included in flexible cuff in the system of resonator upstream side.As disclosed, flexible cuff can be shorter, and the residue length of resonator upstream is taken by upstream line.This has reduced weight and the cost of system.In certain embodiments, upstream line and resonator are integrally formed.In addition, part or all of downstream line can be integrally formed with resonator.
Assembling with the engine compartment of turbosupercharger and subsidiary conduit device has challenge very much.Use another advantage of plastics resonator to be the easy moulding of resonator, do not need radial symmetric.Resonator comprises sleeve insert and blowing pipeline.Blowing pipeline has outward extending two projections, and these two projections define the chamber between sleeve insert and blowing pipeline.Particularly, these projections may be difficult to assembling.But placing parison can be smooth with the mould that forms blowing pipeline in a side.By molded plane in a side, resonator can with plat surface adjacency.The nonrestrictive example of another one is to make the protruding cross section in resonator be square, and contacts with sleeve insert line in the center of foursquare side.In this example, each projection is illustrated in outward extending four chambeies, foursquare summit place.
According on the other hand, provide a kind of method of manufacturing resonator.The method comprise by the sleeve insert of injection molding be placed in blowing device open mold in fixing device on, its middle sleeve insert has in multiple first holes of the first distance along sleeve insert, in multiple second holes at the second distance place along sleeve insert, and the rib extending from sleeve insert outward radial in the 3rd distance along sleeve insert, wherein the 3rd distance is between the first distance and second distance; Make parison slip over the whole length of sleeve insert; By mold cramping, on parison, wherein mould is pressed into parison in sleeve insert at rib with near first end and the second end place of sleeve insert; And air is blown into sleeve insert.
In one embodiment, described method is placed in O type ring on sleeve insert near being further included at least one position in the position that parison is pressed into sleeve insert.
In another embodiment, described method further comprises when parison is sufficiently cooled and from mould, takes out parison when keeping its shape.
According on the other hand, provide a kind of method of manufacturing resonator.The method comprises injection molding sleeve insert, its middle sleeve insert has tube wall and rib, multiple the first holes are on the tube wall along sleeve insert the first distance, multiple the second holes are on the tube wall along sleeve insert second distance place, and rib extends from sleeve insert outward radial with the distance between the first distance and second distance along sleeve insert; When cooling, from mould, take out sleeve insert when abundant; The sleeve insert of injection molding is placed in the open mold of blowing device; Make parison slip over the whole length of sleeve insert; By mold cramping, to parison, wherein mould is pressed into sleeve insert by parison near the first end of rib and sleeve insert and the second end; And gas is blown in sleeve insert.
In one embodiment, sleeve insert has substantially similar thermal expansion character with parison.
In another embodiment, multiple the first holes are have the first height approximate rectangular, and multiple the second holes are have the second height approximate rectangular, and described first is highly greater than described the second height.
In another embodiment, in response to being blown into sleeve insert, air forms the first chamber and the second chamber.
In another embodiment, sleeve insert is made up of first plastics with the first fusing point, and external pipe is made up of second plastics with the second fusing point, and described the first fusing point is higher than described the second fusing point.
In another embodiment, before described method is further included in the sleeve insert of injection molding is placed in the device of blowing, near the first end of sleeve insert and the second end, sleeve insert is preheated.
Brief description of the drawings
Fig. 1 has shown a part for motor, and it has shown the turbosupercharger relevant to metal resonators and pipeline;
Fig. 2 has shown a part for motor, and it has shown the turbosupercharger relevant to plastics resonator and pipeline;
Fig. 3 is the schematic diagram of sleeve insert according to an embodiment of the invention;
Fig. 4 is the cross-sectional view of sleeve insert according to an embodiment of the invention, and wherein external pipe is in the skin blowing of sleeve insert;
Fig. 5 is the detail drawing of the jointing between sleeve insert and the pipeline of blowing in Fig. 4;
Fig. 6 is the schematic diagram of sleeve insert according to an embodiment of the invention;
Fig. 7 is the cross-sectional view that use O type ring according to the present invention is realized an embodiment's of sealing sleeve insert, and wherein external pipe is in the skin blowing of sleeve insert;
Fig. 8 is the detail drawing of the jointing between sleeve insert and the blowing pipeline in Fig. 7;
Fig. 9 and Figure 10 are near the sections of resonator hole according to an embodiment of the invention;
Figure 11 A has shown that sleeve insert is the diagram of the section of the embodiments of the invention of a wall;
Figure 11 B is the optional section of the embodiment shown in Figure 11 A;
Figure 12 and Figure 13 are the schematic diagram of technological process for blowing, and resonator according to an embodiment of the invention can be manufactured accordingly;
Figure 14 is the flow chart of manufacturing resonator; And
Figure 15 is that the noise attentuation of three kinds of resonator design is with the diagram of change of frequency.
Embodiment
As one of ordinary skill in the understanding, can be combined with the feature of describing with reference to the embodiment's of any one accompanying drawing introduction and description various features the optional embodiment who does not clearly state or describe to produce in one or more other accompanying drawings.The combination of described feature provides the representational embodiment of typical application.But, for specific application or mode of execution, may expect the various features consistent with teaching of the present invention to carry out combination and amendment.Someone skilled in the art will appreciate that similar application or the mode of execution consistent with the present invention, as the slightly different mode of execution that is disposed in order each assembly by showing from the embodiment in figure.Someone skilled in the art will appreciate that teaching of the present invention can be applied to other application or mode of execution.
In Fig. 1, metal resonators 10 and pipe-line system 12 are shown.Turbosupercharger 14 is included in compressor 16 and the exhaust driven gas turbine 18 in single housing.Exhaust driven gas turbine 18 is by exhaust gas drive, and exhaust is discharged and is supplied to exhaust driven gas turbine 18 by gas exhaust manifold 22 from cylinder head 20.Fresh air offers compressor 16 by suction port of compressor 24.Pressurized air is fed to out compressor outlet 26 by compressor 16, and afterwards, in certain embodiments, pass through interstage cooler (not shown) before entering explosive motor (not shown).Tube equipment between compressor 16 and interstage cooler comprises: the flexible cuff 28 that is connected to compressor outlet by fixture 30, be connected to the metal resonators 10 of flexible cuff 28 by fixture 32, be connected to the downstream metallic conduit 34 of metal downstream line by welded joint 36.Example shown in Fig. 1 comprises the flexible hose 38 that is positioned at interstage cooler upstream, and it comprises extra two fixtures 40 and 42.In Fig. 1, the downstream side of resonator 10 is connected to the metallic conduit 34 in downstream side by welded joint 36.In some applications, expect to connect plastics downstream line instead of metallic conduit 34 to reduce weight and the cost of pipe-line system 12.But, so to do, the short portion of flexible conduit is for being connected to resonator 10 by plastic pipe, and this will increase by two extra fixtures in system.
As shown in Figure 2, wherein plastics resonator 44 is parts of the pipe-line system 46 between compressor outlet 26 and interstage cooler (not shown) to one embodiment of the present of invention.In the embodiment of Fig. 2, flexible cuff 48 is connected between compressor outlet 26 and resonator 44.There is curved part 50 at upstream side with the resonator 44 of plastics manufacture.Because resonator 44 is molded out of plastic, therefore curved part 50 can be integrally formed with resonator 40.On the contrary, metal resonators can not be closely bending.Therefore, flexible cuff 48 is shorter than the flexible cuff 28 in Fig. 1 significantly.Fixture 52 and 54 is for connecting the flexible cuff 48 between compressor outlet 26 and resonator 44.Resonator 44 is more closely connected to compressor outlet 26 than the resonator 10 in Fig. 1.Most of length of flexible cuff is replaced with to plastics to be had advantages of extra: reduce weight and cost.
In the embodiment shown in Figure 2, downstream line 56 is connected to resonator 44 by joint 58.It is that this has eliminated the demand to chucking appliance system because joint forms by for example spin welding or post forming that joint 58 is difficult to distinguish with the downstream part of pipeline 56 resonator 44.Alternatively, resonator 44 connects in a usual manner by chucking appliance system.According to application and assembling restriction, in an optional embodiment, resonator 44 extends to flexible hose 60 from flexible cuff 48.Flexible hose 60 has upstream fixture 62 and is connected to the downstream fixture 64 of interstage cooler.
Flexible cuff 48 in Fig. 2 is shorter than the flexible cuff 28 in Fig. 1 significantly.This is to comprise significant curved part because be connected to the plastics upstream line of flexible cuff 48.Metallic conduit can not in the case of do not experience can the mobile distortion of restriction easily by curved so closely.With short flexible cuff, subsequently for plastic pipe and be that the system of metal resonators is feasible afterwards.But this requires extra fixture and attachment portion, they easily leak.Therefore, pipe-line system 46 is more conducive to reduce the length of flexible cuff than pipe-line system 12 and/or clamping is connected and minimized.
As shown in Figure 3, sleeve insert 70 has tubular wall, and rib 72 from then on wall outward radial extends.In a side of rib 72, be multiple the first holes 74, this first hole is positioned at the periphery apart from the sleeve insert 70 at 75 first distance B 1 places, one end of sleeve insert 70.On the opposite side of rib 72, be multiple the second holes 76, this second hole is positioned at apart from the periphery of the sleeve insert 70 at the 75 second distance D2 places, one end of sleeve insert 70.The height in hole 74 and 76 is respectively H2 and H1.The damping characteristic of the effect of altitude resonator 70 in hole, the frequency range that particularly resonator 70 is decayed.The design in hole 74 and 76 is to provide the basis that is applied as of resonator.But in vehicle application, the expected range of hole 74 and 76 gap is in height that 5mm is to 25mm.Have in the embodiment in multiple the 3rd holes at some, be provided with three different height.Be located at the enough large expection intensity with maintenance sleeve insert 70 of lintel 78 and 80 between hole, and provide sufficient passage area to allow material to flow during injection molding technique.Barb 82 and 84 is located on the outer surface of sleeve insert 70 in the region of barb 82 and 84, to provide larger surface area during with 70 post forming of sleeve insert when blowing pipeline.Rib 72 can have tip end so that being connected than being connected more firmly of forming with square end on rib 72 and blowing pipeline (not showing in Fig. 3) to be provided.
The cross section of sleeve insert 70 as shown in Figure 4, is wherein blown the skin of pipeline 86 at sleeve insert 70.As shown in the cross section in Fig. 4, the first chamber 90 and the second chamber 88 have formed sleeve insert 70 anchor ring around.Together with the geometric configuration in the shape in chamber 90 and chamber 88 and volume and hole, affect the attenuation characteristic of resonator.In certain embodiments, chamber has different volumes; In further embodiments, chamber has essentially identical volume.For vehicle application, expect the scope of volume at 10-250 cubic centimetre, be typically approximately 50 cubic centimetres.The tip of rib 72 forms sealing with the internal surface of blowing pipeline 86.Blowing pipeline 86 is connected to sleeve insert 70 near the two ends of barb (being not easy in Fig. 4 view) region middle sleeve insert 70.Sleeve insert 70 and blowing pipeline 86 are in the part details of their joints as shown in Figure 5.Barb 84 places on sleeve insert 70 are connected blowing pipeline 86 with sleeve insert 70.As shown in Figure 5, sleeve insert 70 and blowing pipeline 86 fuse together and have formed welding portion 89.The details being connected between rib 72 and blowing pipeline as shown in Figure 6.Tip end on rib 72 is convenient to the connection between two elements in Fig. 6.In the embodiment shown in fig. 6, the tip of rib 72 be tip and formed and be welded to connect 92.
Referring again to Fig. 4, the external pipe 86 of resonator 44 at one end has barb 93.In one embodiment, barb is convenient to be connected with flexible connector (not showing in this figure).
In Fig. 7, show an optional sleeve insert 94, it does not comprise rib or barb.Sleeve insert 94 has hole 96,98 and keeps the lintel 100,102 of the support of sleeve insert 94.In this embodiment, O type ring 104,106 and 108 is placed on the outer surface of sleeve insert 94, is installed to (because O type ring is in groove, therefore groove is invisible in Fig. 7) in the lip-deep groove of sleeve insert 94.In Fig. 8, show the cross section that is connected the blowing pipeline 110 that forms resonator 112 with sleeve insert 94.The first chamber 114 and the second chamber 116 be formed at hole 96 and hole 98 after.In manufacturing process, blowing pipeline 110 in the region of O type ring 104,106 and 108 by being clipped to sleeve insert 94 to seal the first chamber 114 and the second chamber 116, make to be communicated with and only to provide by hole 96 and hole 98 respectively to the fluid in the first chamber 114 and the second chamber 116 from the inside of sleeve insert 94.Sleeve insert 94 is to provide sealing not rely on to reach the temperature of sleeve insert and blowing pipeline to promote combination based on O type ring with respect to an advantage of sleeve insert 70.But O type ring has increased cost and must be arranged in groove.Resonator 44 is to blow pipeline 86 with respect to the advantage of resonator 112 to be had than the larger bending radius of blowing pipeline 110.For radius bend closely, concern be that the wall of blowing pipeline 110 may attenuation.A kind of solution is that the first chamber 114 and the second chamber 116 are removed, and makes bending fewer harmfulness, and the shortcoming of following is the resonator having extended in the raised zones in chamber.Another solution is that the wall of thickening blowing pipeline is enough thick in the region of radius bend closely to guarantee it, but the shortcoming of following is the weight of cost and the assembly of material.
The advantage of plastic sleeve insert and plastic blown pipeline is that expansion characteristics is between the two almost identical.In optional embodiment, plastic sleeve insert can be by blowing, injection molding or machining manufacture.Injection molding makes parts have the tolerance less than blowing.For blowing, machining operations can be used for obtaining the Inner Dimension of expectation and the hole on wall is provided.But, be difficult to remove completely all machining chips.If entering motor, these chips may cause destruction.
In certain embodiments, sleeve insert is formed by metal, and it can have the thermal expansion character identical with external pipe.
Fig. 9 has shown the section of resonator 120 according to an embodiment of the invention.Blowing pipeline 122 has sleeve insert in inside.In the time that section obtains from hole 124, only show a part for the lintel 126 of sleeve insert.Blowing pipeline 122 is sub-circulars, is sub-circular thereby make chamber 128 in the section shown in Fig. 9.Figure 10 has shown an optional embodiment of resonator 130, and a side of wherein blowing pipeline 132 is smooth, thereby makes one in lintel 136 to contact with blowing pipeline 132.The chamber 138 forming is no longer symmetrical.Example shown in Fig. 9 and Figure 10 is only two this examples.Also can use cross section to there is the pipeline of two planar sides, ellipse and square or other any suitable shape.
In the above embodiment who introduces, sleeve insert is tubulose.But in an optional embodiment, sleeve insert is plate, as shown in Figure 11 A.Resonator 300 has the external pipe 302 with plate 304.In one embodiment, plate 304 has outward extending rib 308.Plate 304 has at least one hole 306 in each side of rib 308.Chamber 312 and chamber 314 are formed in the projection of external pipe 302.In an optional embodiment, plate 304 does not have this rib 308, and external pipe 302 contacts with sleeve insert by curving inwardly.Plate 304 is connected to external pipe 302 at 310 places, position.Figure 11 B has shown the optional section of resonator 300.External pipe 302 has plate 304, and it extends through a part for the external pipe 302 connecting at 310 places, position and forms chamber 314.Plate 304 has at least one hole.Two holes 306 as shown in Figure 11 B.In Figure 11 A and 11B, sleeve insert is dull and stereotyped, and rib extends from a side.In other embodiments, described plate adopts the shape of spill, arc or other any appropriate.
In Figure 12, show an example of blowing system 140 with cross section.As mentioned above, sleeve insert is manufactured by injection molding or early than other technique of technological process for blowing.When mould is during in aperture position, the sleeve insert 142 completing is placed in mould 143, as shown in figure 12.Make sleeve insert 142 slip over blowing pin 144 and/or holding device 146.The second blowing pin 148 also can or be set at top alternatively.Parison 150 forms and slips over sleeve insert 142 by the plastics that heat.Sleeve insert 142 is provided with outward extending rib, is positioned at the hole at two axial spacing places and the barb near sleeve insert 142 two ends.
Blowing system 140 also comprises the pneumatic or hydraulic system of the opening/closing position of controlling mould 143.Blowing system comprises funnel 154, pneumatic (or surging) extrusion press 156, torpedo (torpedo) 158, axle 160 and head (die head) 162.The working principle of blowing system 140, known in this field, is no longer further discussed herein.
In Figure 13, mould 143 is shown in the position of closing.The shape of mould makes parison be clipped in three positions 166,168 and 170, and this is corresponding to the barb that is positioned at the two ends of sleeve insert 142 and is positioned at the rib place of sleeve insert 142.Inflation air or other gas are blown over one or two in blowing pin 144,148.Air pressure makes sleeve insert 142 unaffected by hole 172, but acts on the parison 164 of fusing so that it presents the shape of mould 143.Particularly, the first chamber 174 and the second chamber 176 are formed between sleeve insert 142 and parison 164.The jointing of sleeve insert 142 is fused in parison 164 to seal at 166,168 and 170 places, region.When cooling, parison 164 can be called as external pipe or blowing pipeline.Now, external pipe 164 is connected to form resonator with sleeve insert 142.It is too far away that resonator as shown in figure 13 does not all extend beyond sleeve insert 142 in any one direction.In other embodiments, be provided with longer parison and the mould of larger ductility, the longer duct length that makes the resonator forming comprise curved part and pipe-line system.
In Figure 14, show and formed the flow chart of resonator according to an embodiment of the invention.In step 198, sleeve insert forms by injection molding.In one embodiment, in step 200, sleeve insert is heated at join domain place.Whole sleeve insert can preheating before or after inserting mould.Sleeve insert can be heated by ceramic heater, infrared heater or any suitable heater.Parts are preheated to promote the welding between sleeve insert and external pipe.In an optional embodiment, in step 202, O type ring is placed in the sleeve insert skin in join domain 202.In this embodiment, do not use and preheat.In other embodiments, sleeve insert be placed into blowing device (following the frame 204 after frame 198) do not have before preheated.Under any circumstance, in step 204, sleeve insert is all placed in and in mould and in step 206, slips over fixing device.In certain embodiments, fixing device also comprises blowing pin.In step 208, parison slips over sleeve insert.In step 210, mould is closed, thereby clamps parison at folder point place.Afterwards, in step 212, sell air is provided by blowing.Air arrives parison through the hole in sleeve insert.The air of blowing over blowing pin makes parison present the shape of mould.In step 214, parison is cooled, thereby its shape is fixed.After cooling, parison is blowing pipeline or external pipe, and it is connected to form resonator with sleeve insert.In step 216, abundant when cooling when resonator, the sleeve insert (being now resonator) that is connected to blowing pipeline is released by opening mould.Afterwards, in step 218, from sleeve insert, take out fixing device.
Referring again to Fig. 3 and Fig. 4, have much about the sleeve insert of decay and the design details of blowing pipeline that affect resonator.In Fig. 3, hole is rectangular recess.Alternatively, hole can be any other suitable shape, as ellipse and triangle.In an optional embodiment, in Fig. 3, the hole of larger window-like can be replaced by one group of perforation.There is one group of perforation in the situation that this, can be defined as the geometrical center of perforation along the distance in the hole of the length of sleeve insert.Distance between hole is another factor that can affect the attenuation characteristic of resonator.The first volume and the second volume that in the first chamber 88 in Fig. 4 and the second chamber 90, comprise also affect attenuation characteristic.Conventionally determine the suitable value of each parameter with acoustic model, thereby obtain the expectation attenuation characteristic of the application based on intention.
With reference now to Figure 15,, shown respectively the attenuation characteristic with change of frequency: the frequency of the frequency of two chamber metal resonators 220, first liang of chamber plastics resonator 222, second liang of frequency 224 of chamber plastics resonator and frequency 226 of single chamber plastics resonator.The frequency 220,222,224 of two chamber resonators has two damping peaks.The frequency range that the frequency range of two chamber resonator decay decays than the frequency 226 of single chamber resonator is wider.Metal resonators provides than the decay still less of two plastics resonators, and this is considered to because the sleeve insert of metal resonators can not provide sufficient sealing in outside pipe interior press fit.According to an embodiment, one of resonator advantage is that chamber is closed and is connected to blowing pipeline.Two kinds of different plastics resonator design show how the selection of design parameter provides different attenuation characteristics.A plastics resonator provides the noise decrease larger than another frequency range 222 in lower frequency range 224, and cost is to provide decay still less at lower frequency peak region.The volume in two chambeies is generally different, to provide wider scope in the frequency decay of expecting.
Describe preferred forms in detail, those skilled in the art can recognize various optional design and implementation example within the scope of the appended claims.One or more embodiments are described as be in one or more desired characteristics aspect to be had advantage or is more better than other embodiment and/or prior art, those of ordinary skill in the art can recognize the system property that can take compromise to expect with realization between multiple features, and described system property can be depending on concrete application or mode of execution.These attributes include but not limited to: cost, intensity, endurance, life cycle cost, merchantability, outward appearance, assembling, size, usability, weight, productibility, easy assembling performance etc.Be described to not as the desirable embodiment of other embodiment is not outside the present invention's scope required for protection according to one or more characteristics.
Claims (13)
1. a method of manufacturing resonator, comprising:
The injection molding sleeve insert with hole is placed in the open mold of blowing device, and the extension of rib outward radial, described rib is between the first hole and the second hole;
Make parison slip over the whole length of described sleeve insert;
By described mold cramping, on described parison, wherein said mould sandwiches described parison in described sleeve insert at three axial clamp point places, a described rib place at described sleeve insert in described three axial clamp points; And
Gas is blown in described sleeve insert.
2. method according to claim 1, wherein said sleeve insert has tubular wall, rib and at least one barb, multiple the first holes are arranged in the described wall at a distance of the first distance along described sleeve insert one end, multiple the second holes are arranged in along end described in described sleeve insert at a distance of the described wall at second distance place, extend from described sleeve insert outward radial the position of described rib between described multiple the first holes and described multiple the second hole, described at least one barb stretches out from described sleeve insert near the first end of described sleeve insert and the second end, and clamp described mould so that described parison is connected with described sleeve insert three positions, described three positions are: at the described barb place of the first end of described sleeve insert, at described barb place and the described rib place of the second end of described sleeve insert.
3. method according to claim 2, wherein said multiple the first holes and the second hole are grooves.
4. method according to claim 1, wherein said sleeve insert is placed in the fixing device in described open mold, and described fixing device has blowing pin, and the gas that is blown into described sleeve insert is by the transmission of described blowing pin.
5. method according to claim 1, further comprises:
Abundant when cooling, unclamp described mould to discharge described resonator, wherein said resonator comprises the described parison and the described sleeve insert that link together.
6. method according to claim 1, wherein said sleeve insert is plate, this plate has along at least one hole of the first distance of described plate, along at least one hole at the second distance place of described plate, and described plate is smooth, spill or arc.
7. method according to claim 1, wherein said sleeve insert is conduit, first axial distance of this conduit in described duct wall has at least one hole and the second axial distance in described duct wall has at least one hole.
8. method according to claim 1, further comprises:
Near at least one folder point places in three folder points, heat described sleeve insert, thereby promote bonding between described sleeve insert and described parison.
9. method according to claim 1, wherein said sleeve insert is manufactured by the fusing point material higher than the fusing point of described parison.
10. method according to claim 1, further comprises: before described parison slips over described sleeve insert, near a folder point in described folder point, O type ring is placed on described sleeve insert making.
11. 1 kinds of methods for the manufacture of resonator, comprising:
The sleeve insert of injection molding is placed in the fixing device in the open mold of blowing device, wherein said sleeve insert has multiple the first holes along first distance of described sleeve insert one end, there are multiple the second holes along the second distance place of holding described in described sleeve insert, have the rib extending from described sleeve insert outward radial along the 3rd distance of holding described in described sleeve insert, described the 3rd distance is between described the first distance and described second distance;
Make parison slip over the whole length of described sleeve insert;
By described mould holder, on described parison, wherein said mould is pressed into described parison in described sleeve insert in following position: near the first end and the second end of described rib and described sleeve insert; And
Air is blown in described sleeve insert.
12. methods according to claim 11, further comprise:
Near at least one position in the position that described parison is pressed into described sleeve insert, described sleeve insert is preheated.
13. methods according to claim 11, further comprise:
Near at least one position in the position that described parison is pressed into described sleeve insert, O type ring is placed in to described sleeve insert skin.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US24743909P | 2009-09-30 | 2009-09-30 | |
| US61/247,439 | 2009-09-30 | ||
| US12/731,361 US8323556B2 (en) | 2009-09-30 | 2010-03-25 | Manufacture of an acoustic silencer |
| US12/731,361 | 2010-03-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102297050A CN102297050A (en) | 2011-12-28 |
| CN102297050B true CN102297050B (en) | 2014-12-10 |
Family
ID=43779064
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010503931.5A Expired - Fee Related CN102297050B (en) | 2009-09-30 | 2010-09-28 | Manufacture of acoustic silencer |
Country Status (3)
| Country | Link |
|---|---|
| US (3) | US8327975B2 (en) |
| CN (1) | CN102297050B (en) |
| DE (1) | DE102010046759A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| DE102010046759A1 (en) | 2011-04-21 |
| US20130025780A1 (en) | 2013-01-31 |
| US8617454B2 (en) | 2013-12-31 |
| US8323556B2 (en) | 2012-12-04 |
| US20110074067A1 (en) | 2011-03-31 |
| US20110073406A1 (en) | 2011-03-31 |
| US8327975B2 (en) | 2012-12-11 |
| CN102297050A (en) | 2011-12-28 |
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